petl | Python Extract Transform and Load Tables of Data | Parser library
kandi X-RAY | petl Summary
kandi X-RAY | petl Summary
`petl` is a general purpose Python package for extracting, transforming and loading tables of data.
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Top functions reviewed by kandi - BETA
- Convert a table to a field
- Create a filldown view
- Write a table to text index
- Create a DictsView from a table
- Create a new look table
- Write a table to a HDF5 file
- Create a new table in the database
- Return the head of a table
- Peek from iterator
- Get conflicts for a given table
- Create a numpy array from a table
- Create a split view for a given field
- Construct a dtype from a list of flds
- Create a capture view for a given field
- Creates a function that parses a string
- Append a table to a text index
- Join two lists
- Perform anti join
- Bise selection
- Convenience function to convert a table to a column
- Perform a left join
- Creates a rowmap from a rowmap
- Query the table for a single record
- Add a field to a table
- Get values for a table
- Perform lookup join
- Merges two tables
petl Key Features
petl Examples and Code Snippets
Lines of Code : 30License : Permissive (MIT)
Copyrequire 'petl'
module ETL::Example
extend Petl
extend self
def extract
# Grab all data from source(s) here.
# Perferrably return an array of hashes.
end
def transform rows
# Manipulate the data extracted by the previous extra gem 'petl'
$ bundle
$ gem install petl
table_str = """
+--------+--------+-------------------+
| Planets |
+--------+--------+-------------------+
| Planet | R (km) | mass (x 10^29 kg) |
+--------+--------+-------------------+
| Sun | 696000 | output.append(row[1])
output.append(row[4])
output.append(row[1])
output.append(row[4])
class Reader():
def __init__(self, file):
self._file = file
self._initialized = False
self._data = None
def read_file(self):
if not self._initialized:
self._data = etl.fromcsv(self._ficonda create -n test python=2.7
conda activate test
conda install -c bioconda plastid
python
from string import maketrans
import petl as etl
table2 = etl.convert(
table,
'Price List',
100,
where = lambda rec: rec["Cambridge Data"] == '4/30/1989',
)
current = time.strftime('%H:%M',time.localtime())
>>> t2 = time.strptime('12:15', '%H:%M')
>>> t2
time.struct_time(tm_year=1900, tm_mon=1, tm_mday=1, tm_hour=12, tm_min=15, tm_sec=0, tm_wday=0, tmloop = 2
up = 3
down = 4
listvar = [5, 6, 5, 8, 9, 7, 8, 5, 6]
docuvar = docx.Document()
completeList = []
for x in range(loop):
anotherList = []
tablevar = docuvar.add_table(rows=5, cols=5)
for cell in (tablevar.rows[1].celfor x in y:
table = etl.convert(table, ...)
Community Discussions
Trending Discussions on petl
QUESTION
I have this table and I would like to plot the start and end coordinate of petals and leaves (one color for petls and another for leaves).
string id start end petals id 50 100 leaves id 101 151 petals id 152 202 leaves id 203 253 petals id 254 305 leaves id 306 356I don't want represent it with a dot but with a line starting from the start coordinate and ending at the end coordinate for petals and leaves represented with different color.
Is there any way?
...ANSWER
Answered 2022-Mar-10 at 18:06I guess you could have something like this:
QUESTION
I couldn't find any information about reading ascii tables (prettytable-looking). I need to parse some tables that look like this:
...ANSWER
Answered 2022-Feb-15 at 16:28I think you could do this using python, with a few passes you can convert this into something that suits your needs.
QUESTION
I am struggling with library installations. I have not received this error before though.
I get a WARNING: Error parsing requirements for numpy: [Errno 2] No such file or directory: This error occurs whether I use Jupyter notebook or terminal.
...ANSWER
Answered 2021-Nov-17 at 21:43I presume you're on a mac, and you used Anaconda to install python.
In case you don't know, if you're using Anaconda/conda then typically you won't use pip to install packages (likely you're trying above) - but instead you would use conda.
So above would be conda install perl.
If you try to use pip instead, you must use the anaconda pip version, and even then you might run into weird problems like above.
Separately as an alternative to Anaconda, you could try a conda-only (so no UI, minimal default install, latest builds of packages, plus some other benefits) 'conda' version called miniforge. (https://github.com/conda-forge/miniforge). If you have an ARM mac, then conda will default to using native M1 ARM binaries for python and packages, rather than x86 versions.
At present, Anaconda will not use or install ARM native binaries.
I use miniforge without problems to install 99.9% of any packages I install, including numpy. Almost all (numpy included) are ARM native code, install without problems and run a lot faster than using the x86 versions and rosetta.
QUESTION
I want to create a list of key-value pair with the output from /getService route.
I am able to filter the data that i wanted (Suburb and Services) from csv file vet_service_locations but want to have it as a key-value pair. Where keys are suburbs and services and values would be the relevant output.
I'm a beginner and tried different methods but nothing seems to work.
...ANSWER
Answered 2021-Sep-26 at 19:50If you want output to be a list of key-value pairs with suburb as the key and service as the value, then you should replace the lines
QUESTION
I am trying to create a pretty generic class that reads a csv file and has a method that yields each of its rows (I will process each row before yielding it but I am not including that part here to get to the simplest possible example here).
My questionI can think of a solution that will probably work but doesn't feel very elegant. Can you point me to a more pythonic pattern to solve this?
The only restriction is that I cannot use the constructor to open the file. That is because these classes will be used by external tools and need to comply with the right protocols so the file is not available for the constructor.
The "probably not optimal" solution I can think of ...ANSWER
Answered 2021-Sep-21 at 19:55Seems to me you need data and initialized to be object data rather than class data. Also they should be probably marked as private-ish by leading underscore.
Here is how I would approach it:
QUESTION
I'm relatively new on dealing with python libraries so it might be a stupid question but here is the detailed problem:
I'm working on Linux and trying to use a python program (ORF-rater) using python 3.7. Unfortunately, when I run the program, I get the following error:
ANSWER
Answered 2021-Aug-11 at 08:51The following code creates an environment with a specific python version (2.7 since 3.4 was not an option), then you activate it and install the package you need.
QUESTION
I have a Python program that generates reports from data in SQL database. For CI pipeline tests I create an in memory sqlite3 database using the following command:
...ANSWER
Answered 2020-Jun-29 at 06:54Okay as per Klaus' comment, the problem was locale. Our docker container has no localectl process, and even though locale is set in /etc/locale.conf the system defaults to POSIX. Adding LANG environmental variable fixed the problem.
QUESTION
First off, I am very new to all of python. I am now trying to figure out how to replace a time string in a certain column (csv) when that time is greater than the current time.
The script I am building from is relying on petl, so that is what i am using. First, the source csv is opened with petl as table1. It contains multiple columns, one of which is " End time". In this column I would like to replace that time with @time? (for HTML formatting later), only if it is greater than the current time.
the time has the format like "12:15". However, I do not see any change when running the line with >, yet with < all values in the column change.
The line I am struggling with:
...ANSWER
Answered 2020-Apr-28 at 11:03If you only pass hour and minute to time.strptime, strptime automatically fills in the missing values for year, month, day with 1900, 1, 1 - so of course that's always less than time.localtime().
If your table contains times in 24 hour format, you can directly compare the time strings from your table with the localtime in the narrower sense (just the TIME part).
To achieve this, use time formatting like so:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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No vulnerabilities reported
Install petl
You can use petl like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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